New Saw Carbon Rigger Issues

[Hotrods]

I need some help please.

I have run my new out rigger four times now and I cannot seem to get any RPM out of the motor.

Details on Carbon Outrigger are:
Boat length 45 inches
weight 10 lbs (loaded with batteries)
Motor 2260/6
Swordfish PRO+ 240 ESC (LVC 2.5volts, 0 degrees timing, PWM rate 8khz)
Revo Batteries on 8S
prop 42/14

The boat easily pops up on plane with no issues takes a nice set, but it is like is has no RPM

Any ideas?

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[RaceMechaniX]

With Lehner's you need to increase the timing to 15Deg. Try that and check temps afterwards. You can increase the timing to 20Deg and retry if temps are reasonable.
Do you have data from the ESC? Do you know what the voltage sag is under load?
Is this one of Randy's hulls?
-Tyler

[Hotrods]

Tyler,

I do not have data at this time from ESC. Just to be clear on the 2260/6 configured in Triangle, KV 1644 loaded, use 15-20 degress of timing? Yes this is the large rigger he and I worked on coming up with a few years ago. I am just now getting it going, i guess better late then never.........

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With Lehner's you need to increase the timing to 15Deg. Try that and check temps afterwards. You can increase the timing to 20Deg and retry if temps are reasonable.
Do you have data from the ESC? Do you know what the voltage sag is under load?
Is this one of Randy's hulls?
-Tyler

[RaceMechaniX]

Yeah try 15Deg. If that still is not showing the performance you would expect we'll need to check the motor for demagnetization or magnet twisting.

[Hotrods]

Have you ever seen a brand new motor demagnetize or magnet twist? I just got the motor a couple of weeks ago from Lehner.

Yeah try 15Deg. If that still is not showing the performance you would expect we'll need to check the motor for demagnetization or magnet twisting.

[fweasel]

Annecdotal at best, but I've had issues with SF ESC's in the past not going full throttle unless I raised my throttle limit over 100%, sometimes as much as 115%. That was after doing a throttle calibration with the limit set at 100.

[Hotrods]

Yeah Ryan, I was talking to Keith earlier today and he mentioned the same thing. I will check that tonight and see what happens.

Annecdotal at best, but I've had issues with SF ESC's in the past not going full throttle unless I raised my throttle limit over 100%, sometimes as much as 115%. That was after doing a throttle calibration with the limit set at 100.

[RandyatBBY]

Arron, that is the starting prop next after all the bugs are worked out go to a little bigger prop Like a 1716 then if the motor aand esc can take it go bigger. I some times go threw 10 or 12 props to find ability of my motor and esc can handle. to me that is the fun of it.

[RandyatBBY]

Is this one of Randy's hulls?
-Tyler

It is one of the new 47 inch boats that I just built a new 37 inch tub for. I have made 2 so far.

[RaceMechaniX]

Have you ever seen a brand new motor demagnetize or magnet twist? I just got the motor a couple of weeks ago from Lehner.

Yes I have. I am just repairing a 3060 right now that has twisted magnet segments. It's unlikely you have any issue, but if you know everything else is correct but still see issues a twisted magnet will yield similar results.
Just a heads up I am the North American service center for Lehner motors so if you do suspect a problem I will check the motor free of charge. Just pay the shipping.

[Hotrods]

Tyler, thank you very much for the information, I am getting ready to head to the lake this morning I will let you know how it runs.

Yes I have. I am just repairing a 3060 right now that has twisted magnet segments. It's unlikely you have any issue, but if you know everything else is correct but still see issues a twisted magnet will yield similar results.
Just a heads up I am the North American service center for Lehner motors so if you do suspect a problem I will check the motor free of charge. Just pay the shipping.

[Hotrods]

I was able to run the boat this morning, after I changed the timing to 16 degrees, and made sure the endpoint was correct for the throttle on my controller. The boat might have ran a little better, but it is still very slow. I do not have the software to data log the ESC at this time, so cannot give you any more information. I will order the software for the ESC, (which I am surprised they do not send it when you order one brand new).

[Fluid]

A few thoughts:

What is the estimated speed of the boat? A stopwatch and tape can help figure that out.

Exactly what batteries are the OP using?

Is he certain that the ESC is properly calibrated to his transmitter?

Did he try setting the PWM to 12 kHz?

Did he try setting the transmitter throttle endpoint to 150%?

What are the temperatures of the motor endbell, ESC and batteries after a run? How long was the run?

Is the ?42/14? prop a 42mm diameter 3-bladed prop with 2.35? of pitch?


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[Hotrods]

Hello Jay, thank you for the help on the questions. I will answer the best to my knowledge.


What is the estimated speed of the boat? A stopwatch and tape can help figure that out. Current estimated speed 70mph

Exactly what batteries are the OP using? All I have currently are order Revos 420 Blend 5000MAH 70C, I need to batteries I know that.

Is he certain that the ESC is properly calibrated to his transmitter? I have calibrated the ESC to my highest throttle end point of 120%, Futaba Fasst Radio

Did he try setting the PWM to 12 kHz? I have not tried 12 kHZ, I have only ran it on 8kHZ.

Did he try setting the transmitter throttle endpoint to 150%? My highest end point setting is 120%

What are the temperatures of the motor endbell, ESC and batteries after a run? Highest temps are currently 120 F How long was the run? 2-3 passses for maybe 5 sec each and bring it in.

Is the ?42/14? prop a 42mm diameter 3-bladed prop with 2.35? of pitch? My last run was with prop ABC Two Blade 1814-17-45(2) 45MM dia


.[/QUOTE]

[RaceMechaniX]

Looking at the data is the next reasonable step to determine root cause. Do you have another ESC to substitute for a test? Preferably a non-Swordfish ESC like a Castle with datalogging?

A charged 8S battery should be producing about 42-44kRPM with that propeller. So with reasonable slip you should be around 75-80mph.